FORMATIONS OF DEVONIAN AGE. 91 
STORMVILLE SANDSTONE. 
This formation is present only in the southern half of the Wallpack 
ridge in New Jersey, but, according to White,* who named the for- 
mation in Pennsylvania, it becomes a more and more conspicuous 
formation to the south, and gradually replaces the more calcareous 
and shaley strata until it occupies the entire interval between the 
Coeymans limestone and the Oriskany sandstone, becoming con- 
tinuous with this higher, arenaceous bed. 
In New Jersey the formation makes its first appearance just south 
of Hainesville, where it occurs as a thin, sandy layer at the top of 
the Coeymans limestone. South of this locality, for some distance, 
it is not a conspicuous formation, it being too thin a bed and too 
heavily drift covered to afford noticeable exposures. Below Peter’s 
Valley, however, it becomes more strongly developed, and is frequently 
met with. A good exposure of it may be seen in the side of the road 
. crossing the Wallpack ridge at Wallpack Center. At one locality above 
Wallpack Center the formation contains numerous fossils, but they 
are all imperfect casts, and cannot be identified with any certainty, 
though most of them appear to be identical with species which occur 
in the cherty limestone, the basal member of the New Scotland beds. 
At Flatbrookville this sandstone occurs, and from the base of the 
formation specimens of Gypidula galeatus were collected, while beds 
lying above it contain a fauna characterized by Spirifer macropleurus, 
which indicates that at this locality the Stormville sandstone has 
replaced the lower, cherty hmestone member of the New Scotland beds. 
BECRAEFT LIMESTONE. 
In a preliminary report upon the formations of the Wallpack ridge 
in New Jersey + a hard, gray, cherty limestone, lying above the shaley 
member of the New Scotland beds, was included in that formation, 
being considered as a third, or higher, member of the New Scotland 
beds. Further study has led to the conclusion that this lhmestone 
represents, and is the southern continuation of, the Becraft lhmestone 
of the New York section. It is a very hard and resistant layer, and 
_*Second Geol. Surv. Penn., Rep. G. 6, pp. 132, 133. 
Ann. Rep. State Geol. N. J. for 1899. 
